Extension builder estimates (based on hourly rates) to build a single storey extension in BR1
Range from the cheapest single storey extension £35600 (Our Builders Ltd based in SE6) to the dearest single storey extension £48720 (Pineapple Interiors based in BR1).
Comparing extension builders estimates for fitting a downstairs toilet gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes to build a single storey extension in BR1 by posting a job with HaMuch and we will send it to extension builders in BR1.
Estimates for common extension builder jobs in BR1;
| Job | Estimate |
| Underpinning a house | £17317 |
| Build a two storey extension | £87725 |
| Build a timber frame extension | £25817 |
| Install a swimming pool | £80817 |
| Cost to build a single storey extension | £46333 |
| Cost to build a side return extension | £35437 |
| Install an RSJ | £2017 |
| Build an outbuilding | £9817 |
| Build a mansard loft conversion | £51817 |
| Cost of a loft conversion | £32031 |
| Build a kitchen extension | £41817 |
| Build a hip to gable loft conversion | £41817 |
| Build a granny annexe | £86817 |
| Build a garden office | £9817 |
| Convert a garage | £15817 |
| Build a new garage | £18317 |
| Build a flat roof extension | £21817 |
| Build a dormer loft conversion | £41817 |
| Lay a concrete foundation | £6067 |
| Convert a bungalow loft | £28817 |
| Basement conversion cost | £35437 |